quasar | 655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995

General

Target

655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
Size

3.1MB
MD5

ee86735f1427e86dcbba39339cecfe15
SHA1

cd492443264bdae1f0a5e5f16e57af3d1819a3ec
SHA256

655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995
SHA512

59309d24c6df7d66033afe1aac2a7cc734438c3a6dfd02ad8a20299216fee4417dd10931a283366cbf42dea2b83b3e451527817c084bb20aac4c9800c68b82b1
SSDEEP

49152:2v9t62XlaSFNWPjljiFa2RoUYI8IRJ6ibR3LoGdeoYtTHHB72eh2NT:2v/62XlaSFNWPjljiFXRoUYI8IRJ6c

Score

10^/10

quasar qussa spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Qussa

C2

ggergejhijseih.myvnc.com:47820

Mutex

5910e19f-3073-4c42-a174-513d316126e7

Attributes

encryption_key
7A23123B6E1E0CCDB27477C6C7654C7BE2FEDE54
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
xml
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2292-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ce8-6.dat	family_quasar
behavioral1/memory/2244-9-0x0000000000B20000-0x0000000000E44000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2244	Client.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	Client.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2024	schtasks.exe
2776	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
Token: SeDebugPrivilege	2244	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 2024	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	28
PID 2292 wrote to memory of 2024	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	28
PID 2292 wrote to memory of 2024	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	28
PID 2292 wrote to memory of 2244	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	30
PID 2292 wrote to memory of 2244	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	30
PID 2292 wrote to memory of 2244	2292	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	30
PID 2244 wrote to memory of 2776	2244	Client.exe	31
PID 2244 wrote to memory of 2776	2244	Client.exe	31
PID 2244 wrote to memory of 2776	2244	Client.exe	31

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
"C:\Users\Admin\AppData\Local\Temp\655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2024
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
ee86735f1427e86dcbba39339cecfe15

SHA1
cd492443264bdae1f0a5e5f16e57af3d1819a3ec

SHA256
655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995

SHA512
59309d24c6df7d66033afe1aac2a7cc734438c3a6dfd02ad8a20299216fee4417dd10931a283366cbf42dea2b83b3e451527817c084bb20aac4c9800c68b82b1

Download Submit
memory/2244-8-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-9-0x0000000000B20000-0x0000000000E44000-memory.dmp

Filesize
3.1MB

Download
memory/2244-11-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-12-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2292-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

Filesize
4KB

Download
memory/2292-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp

Filesize
3.1MB

Download
memory/2292-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2292-10-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads